Kop flops Andriy Voronin and Ryan Babel could all leave Liverpool next month as Rafa Benitez looks to raise funds in order to strengthen his stuttering squad.

The Spaniard has grown frustrated with the form and attitude of £10million Dutch forward Ryan Babel, who was last seen limping out of his side's draw with Manchester City in mid-November.

Voronin has fared even worse. The Ukrainian last scored for Liverpool on the final day of the 2007/08 season and has dropped behind youngsters Nabir El Zahr and Dani Pacheco in the pecking order.

Kop flops: Babel (left) and Voronin (right) have failed to shoulder the goalscoring burden in the absence of Fernando Torres

West Ham frontman Carlton Cole and Crystal Palace winger Victor Moses top Benitez's wish list, but with money scarse at Anfield in January the Spaniard is expected to cash in on a pair who have personified Liverpool's decline.

'We know at this time that we have to manage the squad and try and do some changes in the transfer window,' he said. 'Normally, players that are not playing will be looking at other options, especially with a World Cup coming up.

'There has been interest in some of our players.'

Babel, who joined Liverpool in 2007 after excelling in the Netherlands Under-21s run to the final of the European Championships, is reportedly a target for German giants Bayern Munich.

Voronin, meanwhile, tops the list of targets for Panathinaikos in Greece but would favour a move back to the Bundesliga where he excelled on loan last season.

Another player who could also leave Liverpool is Andrea Dossena. The Italian has featured in fits and bursts since moving to Merseyside from Udinese in July 2008.